Automatic stave-sawing machine.



G. B. HAMRIC.

AUTOMATIC STAVE SAWING MACHINE. APPLICATION FILED JULY 15. I9I4.

1,22,635) Patented May 1, 1917.

4 3 SHEETSSHEET 2- awn/whoa,

G. B. HAMRKC.

AUTOMATIC STAVE SAWING MACHINE.

APPLICATION FILED JULY 15, 1914.

1,24 8% Patented May1,1917.

3 SHEETSSHEET, 3.

GROVER B. HAMRIC, OF SLEITH, WEST VIRGINIA.

AUTOMATIC STAVE-SAWING MACHINE.

Specification of Letters Patent.

Patented May 1, 1917.

Application filed July 15, 1914. Serial No. 851,167.

To aZZ whom it may concern:

Be it known that I, GROVER B. HAMRIC, a citizen of the United States, residing at Sleith, in the county of Braxton, State of WVest Virginia, have invented certain new and useful Improvements in Automatic Stave-Sawing Machines, and I do hereby declare the following to be a full, clear, and exact description, of the invention, such as will enableothers skilled in the art to which it appertains to make and usethe same.

This invention relates to an automatic stave sawing machine.

An object of the invention is to provide a machine of this character in which the reciprocation of the carriage will be automatically effected.

A further object of the invention is to so construct a machine that the mechanism for causing the reciprocation of the carriage may be thrown into and out of operative relation with the driving disk.

A still further object of the invention is to provide means for clamping the block which is to be sawed into staves upon the carriage of the machine.

With these and other objects in view, such as will appear as the description progresses, my invention comprises the combination and arrangement of parts as herein set forth and subsequently claimed.

Referring to the drawing:

Figure 1 is a plan view of the machine.

Fig. 2 is-an end elevation thereof.

Fig. 3 is a side elevation.

Fig. 4: is a fragmental sectional view, showing the means for preventing the block on the carriage from being longitudinally displaced.

Fig. 5 is a similar view, showing the means for preventing the block from being vertically displaced.

Fig. 6 is a fragmental plan View, showing the actuating means for the carriage swung into inoperative position.

Fig. 7 is a fragmental sectional view, showing the sliding connectlon between the parts of the carriage actuating rod.

Fig. 8 is a perspective view of the block for clamping the block in place on the carriage.

Fig. 9 is a fragmental view, showing the brake for preventing the motion of the carriage actuating rod.

Referring to the drawing wherein like parts are indicated by like characters throughout the several views The machine comprises a bed 1 supported on legs 2.

Rotatably mounted in bearings 23 on the bed of the machine is a cylindrical saw l. To one side of the saw on the bed 1 are a pair of spaced parallel tracks 5 on which is mounted for reciprocation a carriage 6 for a block which is to be sawed. On the ends of this carriage are grooved wheels 7 which ride on the track 5 to facilitate the reciprocation of the carriage. A block is placed upon this carriage and the carriage is reciprocated so that the block thereon is fed into the saw as the saw rotates so that staves may be sawed from the block.

In order that the block may be effectively held upon the carriage, I have provided the following mechanism:

Secured to the side bars 8 of the carriage are a pair of spaced angular members 9 on which the block rests which are inclined toward the saw in such manner that after the saw cuts a strip therefrom the said block will be automatically fed against the gage.

On the end bar 10 of the carriage is formed a pair of spaced guide members 11.

Slidable between these guide members is a block 12, which has beveled edges 13, the angle of inclination of which is equal to the angle of inclination of the divergent edges of the guides.

On the inner end of this block is an up wardly extending lug 14: and on the outer end of the block 12 pivoted between cars 15 is a downwardly extending arm 16, which arm 1s also pivotally secured, at 17,

. between ears 18 on the outer face of the bar 1.0. The block 12 is normally held inwardly by a leaf spring 19, which bears against the lower portion of the arm 16, below its pivotal point 17. This block normally during the forward reciprocation of the carriage prevents the block, against which the lug 14 bears, from being displaced longitudinally. As the said block is fed into the saw, however, at the end of each backward reciprocation the lower end of the arm 16 strikes against the cross bar 20 carried between spaced ears 21 extending downwardly from the end of the bed 1 so that the lug 14 is drawn out of engagement with the end of the block.

The block is held by the usual gage 22 so that a predetermined amount will be sawed therefrom.

In order that the block may be prevented from vertical displacement during the sawing of the same, I have provided upwardly extending arms 23 connected by a bar 2L and secured to this bar midway between its ends is a disk 25 having a peripheral notch 26 therein.

Pivotally mounted adjacent to this disk is a member 27 having spaced parallel arms 28 and 29. This member 27 is normally pressed dmvnwardly against the top of the log by a coil spring 30 which is secured to the rod 24: and to the upper arm 28 of the member 27.

()n the upper face of this arm 28 is a bearing 31 in which is slidably mounted a bolt 32 having an outwardly extending arm which projects across the disk. 25 and is normally held into engagement with the periphery thereof by a coil spring 34: which is secured to a pin on the said bolt and bears against the end of the bearing 31.

lVhen it is desired to lift the block from the carriage, the member 27 is swung about its pivot upwardly until the projection on the bolt 32 engages in the notch 26 in the disk 25, which maintains the member 27 in an upwardly extending position.

In order that the projection 33 may be withdrawn from the notch 26 when it is desired to swing the member 27 again down into engagement with the block, I have provided means for releasing the projection from the notch which comprises a bell crank lever 35 pivoted between ears 36 adjacent to the outer end of the bolt 32 and connected to the said bolt by a link 37 so that the operation of this lever 35 will disengage the bolt 32 from the disk 25 and thus permit the member 27 to be swung downwardly.

In order that the carriage may be automatically reciprocated I have provided the following mechanism:

Formed on and extending from the carriage is a lug 38.

Secured to a base 39 is a bearing e0 in which is revolubly mounted a vertical shaft 41. Fixed to the upper end of this shaft above the bearing L0 is a plate e2 having an upwardly extending pin 43 adjacent to its periphery.

Slidably mounted on this pin is a rod at having a slot 45 therein which engages the pin. This rod is pivoted on the upper end of a post 46 and as the plate l2 rotates the arm is oscillated about its pivotal point. This rod has an enlargement 47 on its end in which is formed a socket l8.

Pivotally secured to the lower end of the lug 38 is a block .49 having a reduced cylindrical portion which extends into the socket 48 and is freely slidable therein so that during the reciprocation of the carriage downwardly the member 50 will ride into and out of the socket d8 as the distance between the pivotal point 46 of the rod at and the point of attachment to the carriage decreases or in- CI'GZISGS.

An oil cup 51 is provided and secured to the enlargement 47 and has communication with the socket &8 so that the same may be continuously supplied with oil.

In order that the plate 42 may be rotated and the carriage reciprocated a beveled gear 52 is secured to the shaft L1 and meshes with a beveled gear 53 on a shaft 54: which shaft is supported in bearings 55 on a casting 56. Extending outwardly from this casting is a bearing member 57 through which the shaft 41 passes and on which shaft the casting 56 may have pivotal movement.

Fixed to the shaft 54 is a friction disk 58 which bears against the face of a second friction disk 59 fixed to the shaft 59, which may be driven in any suitable manner.

On the side of the disk 59 is a pulley 60 over which passes a belt 61 which belt also passes over a pulley 60 mounted on the shaft 61 journaled in bearings 63 on one leg of the machine.

A second pulley is secured to the shaft on which this pulley 62 is mounted and a belt 66% passes over this pulley and over apulley 65 on the shaft of the saw 1.

In order that the carriage may be prevented from reciprocation without stopping the rotation of the saw the casting 56 is pivoted to the shaft 41 as previously described and a lever 66 pivoted in bearings 67 is connected to the casting by an arm 68 so that the said casting may be shifted about its pivot to cause the disk 58 to engage or disengage the driving disk 59.

In order that the rotation of the disk 58 may be stopped after the said disk has been disengaged from the disk 59 I have provided a brake 69 pivoted between ears 70 on the casting 56 and having an operating treadle 71.

It may be thus seen that I have provided a device by means of which the block from which staves are to be sawed will be securely fastened to thecarriage so as to be prevented from having either longitudinal or vertical displacement, and I have further provided means for automatically disengaging the means for preventing the longitudinal displacement at the end of each reciprocation of the carriage, and I have still further provided mechanism for causing the carriage to reciprocate, which mechanism may be disconnected from the source of en ergy so as to allow the saw to rotate but prevent the reciprocation of the carriage.

While I have described a particular construction, it has only been for the sake of illustration for it is obvious that numerous changes may be made within the structure of the device Without departing from the spirit of the invention as defined by the claim.

What is claimed is A stave sawing machine comprising a bed, means on the bed for carrying a block to the saW, arms on the block carrying means, a rod supported by the arms, a spring pressed member pivotally supported by the rod, a disk fixed to the rod, said disk having a notch in its periphery, spring pressed means on the member for normally engaging the periphery of the disk and adapted to engage the notch to hold the member in an elevated position.

In testimony whereof, I affix my signature, in the presence of tWo Witnesses.

GROVER B. HAMRIC.

Witnesses:

J. M. HAMRIO, MELISSA RoLLYsoN.

flopies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

